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Mast cells stimulated with Mycobacterium tuberculosis (Mtb) shows low levels of hydrogen peroxide. HMC-1 cells were left unstimulated (control) or stimulated with PMA, live Mtb, or heat-killed Mtb (HK-Mtb) for 90 min and hydrogen peroxide was evaluated. The graph represents the change in fluorescence ± SD of stimulated cells compared to unstimulated cells. ***p < 0.001 as indicated.
